The method of preparation watered kimberlite pipes to underground mining

 

(57) Abstract:

The method relates to mining and can be used to prepare for the underground development of irrigated kimberlite pipes in the conditions of the Yakut diamond deposits. The method includes the determination of the zone of displacement around the kimberlite pipes from underground mining of the lower horizon, the penetration zone of the displacement of the main and auxiliary mine shafts, post production along a helical line in descending order around kimberlite pipes, the main and auxiliary mine shafts for drilling and plugging of wells. The beginning of each round of production combined with the main mine shaft, and the end of each round - with the auxiliary shaft barrel. As drilling production are drilling grouting of wells, and the center of each subsequent well feature at the intersection of radii r1and r2equal to r1= k1F1, r2= k2F2where k1- coefficient taking into account the uneven tamping the last wells, k1= 0,6-1,0; F1- the actual diameter of the zone of bridging the last plugged wells, m; k2- coefficient taking into account the uneven temporini, M. the sinking of production are under the protection of a waterproof curtain due to the plugging of wells drilled from the previous round openings. To control the reliability of the waterproof curtain of plugging the end of the previous round ahead of the tunnel face in the area of the route round production are drilling monitoring wells, some of which after opening the mine workings extend to vent or vent-way sbec. The method provides preparation for working with high quality grout at low costs and deadlines. 2 C.p. f-crystals, 6 ill.

The invention relates to mining and can be used to prepare for the underground development of irrigated kimberlite pipes in the conditions of the Yakut diamond fields.

For kimberlite deposits in Yakutia by underground methods need to solve the problem of finding effective system for the protection of mining operations from the discharge of groundwater with a salinity of 90-350 g/l, with the intensity of the water strong brines from aggressive groundwater, which are concentrated in powerful 50 feet-aquifers and complexes at a depth of 250-500 what stakami, marl, calcareous Dolomites, Dolomites, limestones unevenly marbleized with bronzewing structure, rock salt, gypsum, calcite.

The Deposit area belongs to the zone of continuous permafrost with the location of the zero isotherm at a depth of 720-740 m In the zone of the aquifer reaches a temperature of from -1 to -3oC. the Number of days per year with freezing temperatures on the surface about two hundred days.

The applicant did not know of the technical solution for the preparation of the watered kimberlite pipes to underground mining.

The technical task of the invention is to prepare watered kimberlite pipes to underground mining with high quality grout at low cost and turnaround time.

This is achieved as follows. Determine the area of reducing around the kimberlite pipes from underground mining of the lower horizon, the zone of displacement are the main and auxiliary mine shafts and around the Kimberley, the main and auxiliary mine shafts along a helical line, in descending order, are the production for drilling and plugging of wells. The beginning of the s stem. As drilling production are drilling grouting of wells, and the center of each subsequent well feature at the intersection of radii r1and r2equal

r1=k1F1,

r2=k2F2,

where k1- coefficient taking into account the uneven tamping the last wells, k1=0,60-1,0;

F1- the actual diameter of the zone of bridging the last salamonia-private wells, m;

k2- coefficient taking into account the uneven tamping penultimate wells, k2=0,6 - 1,0;

F2- the actual diameter of the zone of bridging the penultimate wells, m

Thus, the driving of production are under the protection of a waterproof curtain due to the plugging of wells drilled from the previous round openings. To control the reliability of the waterproof curtain of plugging the end of the previous round ahead of the tunnel face in the area of the route round production are drilling monitoring wells, some of which after opening the mine workings extend to vent or vent-way sbec.

Significant differences of the proposed technical solutions are the following.

Opiine are the main and auxiliary shafts, and around the Kimberley, the main and auxiliary mine shafts along a helical line, in descending order, are the production for drilling and plugging of wells.

This solution can dramatically decrease the length of plugging wells, to ensure the accuracy of drilling, to increase proizvoditelnosti drilling rigs. The drilling depth is determined by the technological possibilities for plugging wells to ensure the creation of robust waterproof curtains in a complex changing environment of the aquifer. The depth of plugging wells can range from 10 to 50 meters or more and sets pitch helix. This takes into account the possibility of technological equipment for drilling and plugging. In the erection of a waterproof curtain depth of the wells can vary and be adjusted as the study of the aquifer and create new materials for backfill. The length of the wells adjust change the angle of penetration of screw production. All this allows to obtain robust waterproof veil with minimal effort.

The beginning of each round of production combined with the main solution provides the sinking develop along a helical line with safe working conditions.

As drilling production are drilling grouting of wells, and the center of each subsequent well feature at the intersection of radii r1and r2equal

r1=k1F1,

r2=k2F2,

where k1- coefficient taking into account the uneven tamping the last wells, k1=0,6 - 1,0;

F1- the actual diameter of the zone of bridging the last plugged wells, m;

k2- coefficient taking into account the uneven tamping penultimate wells, k2=0,6 - 1,0;

F2- the actual diameter of the zone of bridging the penultimate wells, m

This solution enables the creation of a working waterproof veil.

Numerous studies have established that a waterproof curtain depends on a number of factors: fracture of the array, the angle of the cracks, the extent of their disclosure, the stress state of the array, the temperature regime of the species, density and porosity of the array, watering array, osmotic pressure, chemical composition of dissolved substances, etc.

Successful waterproofing works largely Basilicata gels, silica sols, gramigna, bitumens and emulsions, epoxy and polymer resin) for each case, the possibility of regulating their rheological properties, ability to form physical and chemical processes in solutions flowing in the period of structure formation. The movement of the cement slurry in fractured porous media is a complex process, which has been found by numerous studies, depends on the elastic properties of the array of filter parameters and character of rock fracturing, the technology of injection of cement slurry.

Thus, the waterproof construction of the veil is a sophisticated production process that consists of a combination of closely related operations for drilling wells, the definition of hydromechanical characteristics of water formations, injection into permeable zones of cement slurries with the given parameters and quality control water shut-off of the rocks.

Multivariate correlation operations require rapid technological assessments of the effectiveness of work and coordination to make the best decisions to ensure the required efficiency.

In before the. what about each well are operational account of all influencing parameters during the drilling and plugging of wells. The location of the subsequent well determined by the results of plugging the previous two, which is almost completely eliminate the defects in the work due to ignoring any hidden factors.

As for faster, more accurate drilling technical solution envisages a change in the depth of the wells to enhance the quality of conducting waterproof veil.

The sinking of flat production in a spiral technically is not difficult. Created tunneling machines that are on the sedimentary rocks of the fortress to 8 on a scale of Professor M. M. Protodiakonov able to take up to 100 meters per month, i.e., can almost be any need for technological operations footage workings when performing waterproof curtain. In addition, drilling length up to 30-50 m are the rigs are capable of drilling up to 200 m/shift.

From foreign experience. The sinking of the underwater part of the double track railway tunnel Seikan length 23.3 km was carried out under the sea by the Strait under hydrostatic pressure of melanelia saw the systematic pre-injection with the to create around the tunnel durable waterproof screen TV, a fully perceiving the hydrostatic load.

Injection was performed at a depth of 60-80 m through a bore diameter of 65 mm (the well deviation did not exceed 2 m). The rate of penetration of the main tunnel 70-80 m/month. In the service tunnel, the ROP has reached 260 m/month. Thus, the modern development of mining machinery allows you to successfully pass mine in flooded conditions. Mining can reduce the length of the hole, to increase the speed of drilling, to increase their number, give the ability to quickly resolve issues on creation of a robust waterproof veil.

The sinking of production are under the protection of a waterproof curtain due to the plugging of wells drilled from the previous round openings.

This solution simplifies the technology of the production through the creation of zones plugged rocks on the highway its about doing that increases productivity sinking.

To control the reliability of the waterproof curtain of plugging the end of the previous round ahead of the tunnel face in the area of the course orbits virnich or ventilation-way sbec. The solution provides reliable control over the technical condition of waterproof curtain. Determine the state of a rock mass along the sinking of the next round of production for well drilling and plugging. In addition, some monitoring wells after drilling the bottom output expands (razvarivat) to 300-500 mm, and used for ventilation of the tunnel bottom output, which improves working conditions.

Part of the monitoring wells may extend up to 800-1200 mm are used as ventilation ducts and the back emergency exit. The number of ventilation and ventilation-way sbec appoint compliance with the rules of conducting a dead-end workings, as well as economic calculations.

Appropriate screw for the production of drilling grouting wells to pass upward and out to drill the cement sets vertical wells.

This solution provides the removal of water from the bottom by gravity, which simplifies the technology. This option is possible when the main and auxiliary mine shafts intersect house water reservoir.

It is also advisable in addition to vyrabotki the ku drilling grouting wells and develop these to interconnect horizontal Bonami.

This solution allows to provide education waterproof veil of almost any desired thickness. Additional power used to accommodate the drilling rig during the drilling of wells located at a distance outside of the contour of the main production and drilling additional drilling niches economically impractical. Horizontal breakthrough between the workings used for shunting operations mining equipment and as emergency exits.

The proposed solution allows you to build a robust waterproof veil under constant control in fact each drilled and plugged holes. In addition, the presence of generation plugged in the array will provide control over the operation of the waterproof curtain.

An example of performing the method of preparation watered kimberlite pipes to underground processing shown in Fig. 1 - 6, where: Fig. 1 is a schematic diagram of the method of preparation watered kimberlite pipes to underground mining when performing drilling production drilling of wells and plugging in descending order along a helical line - vertical section; Fig. 2 - same with vypolneniyasvoey veils around wells with continuous drilling and plugging; Fig. 4 - same as Fig. 3, when using additional power for drilling and plugging of wells; Fig. 3 is a diagram of a drilling monitoring wells from vicepresidency production-vertical incision along the long axis of generation; Fig. 6 - same as Fig. 5, a vertical section a-a in Fig. 5.

To prepare for the development of irrigated kimberlite pipes 1 to underground mining (Fig. 1) crossing the aquifer 2, determine the zone of displacement 3, which will occur during the mining operations on the lower underground horizon.

Beyond the zone rock 3 are the main and auxiliary mine shafts 4 and 5. Sinking mine shafts 4, 5 through the aquifer Gori umbrella 2 by prominent special ways. Above an aquifer 2 from the main shaft 4 start sinking downward spiral line around the watered kimberlite pipes 1 and the main and auxiliary mine shafts 4, 5 descending generation 6 for drilling the wells 7, which is used to backfill array with the formation of the waterproof curtain 8 in the form of a helical strip is required (for water resistance) thickness.

Option education waterproof curtain 8 in ascending ESD shaft 4 under the aquifer by known methods, used when drilling excavations under the aquifers. Waterproof veil 8 in the version obtained in the form of a helical strip upward. As penetrations 6 or descending ascending 9 workings drilling of wells 7 for plug array in the formation waterproof curtain 8 and the center of each subsequent well 7 is placed on the intersection of the radii r1and r2equal

r1=k1F1,

r2=k2F2,

where k1- coefficient taking into account the uneven tamping the last wells, k1=0,6-1,0;

F1- the actual diameter of the zone of bridging the last plugged wells, m;

k2- coefficient taking into account the uneven tamping penultimate wells, k2=0,6-1,0 (and the coefficients k1, k2may be when you cut a new hole different from each other);

F2- the actual diameter of the zone of bridging the penultimate wells, m

If the cross section of the descending generation 6 does not allow you to place the wells 7, then along it at a certain distance are drilling the camera 10 (niches). At large thicknesses waterproof curtain 8 is suitable penetration will complement the vazhiny 7 is determined by the above formulas, and well 7 can be positioned in the cross section of the descending generation 6 and additional production 11 and completed drilling the camera 10. Between a descending 6 and generate additional 11 connect the horizontal Bonami 12, which is used for maneuvers mining equipment and as an emergency exit through the next generation. Similarly, additional generation 11 may be formed next to the rising generation 9, while wells 7 Buryats up (not shown). The depth of the wells 7 ground conditions create a reliable waterproof jumper and economic considerations. Deviations wells 7 should not exceed permissible errors when plugging in the array, the reliability of the backfill should be provided for the full depth of wells 7 and maximum productivity during the drilling and plugging of wells 7. The depth of the wells 7 adjust the angle of the helical line with sinking output. To control the reliability of the waterproof curtain 8 of the descending generation 6 (Fig. 5, 6) of the previous round ahead of the tunnel face 13 in the area of the track 14 are drilling monitoring wells 15, part of which, after opening of the tunnel face 13 extends to the m 800-1200 mm

An example of performing the method of preparation watered kimberlite pipes to underground mining. From the main shaft 4 above the aquifer around 2 flooded kimberlite pipes 1 and shafts 4 and 5 begin to pass along a helical line in descending order descending generation 6. When you first turn of the possible sinking of development leading plugging array by known technologies. The subsequent sinking of turns descending generation 6 are protected by waterproof curtain 8 due to the plugging of the array of wells 7, drilled from the previous round. As the penetration of the descending generation 6 are drilling down hole 7, and the center of each subsequent well 7 is placed on the intersection of the radii r1and r2(Fig. 3, 4). When drilling the next hole 7 conduct research array in order to obtain the necessary data for backfill. Backfill are, for example, clay-cement mortar determined empirically. When conducting cement works are fixing the flow of cement slurry, pressure and mode of bridging. Then known techniques to determine the actual size of the zone of the plug received in the bore 7.

To control waterproof curtain 8 in the most disadvantaged (vulnerable) areas are drilling monitoring wells 15 from the end of the previous round in ahead of the tunnel face 13 in the area of route 14. Upon receipt of the negative characteristics of plugging are drilling additional wells (additional wells in Fig. not shown and defined by the results of plugging adjacent wells) and produce additional plugging. After opening the tunnel face 13 of the control wells 15 (Fig. 5) some of them extend to the size of the ventilation breakthrough 16 or ventilation-way of the breakthrough 17, providing a second exit from the tunnel face 13, creating a safe working environment. When using option education waterproof curtain 8 in ascending order (Fig. 2) plugging lead from the holes 7 drilled up from Westem technologies to plug ascending wells.

1. The method of preparation watered kimberlite pipes to underground mining, namely, that define the zone of displacement around the kimberlite pipes from underground mining of the lower horizon, the zone of displacement are the main and auxiliary mine shafts and around the Kimberley, the main and auxiliary mine shafts along a helical line, in descending order, are the production for drilling and plugging of wells, the beginning of each round of production combined with the main mine shaft, and the end of each round - with the auxiliary shaft barrel, as sinking production are drilling grouting wells, moreover, the center of each subsequent well feature at the intersection of radii r1and r2equal

r1= k1F1,

r2= k2F2,

where k1- coefficient taking into account the uneven tamping the last wells, k1= 0,6 - 1,0;

F1- the actual diameter of the zone of bridging the last plugged wells, m;

k2- coefficient taking into account the uneven tamping penultimate wells, k2= 0,6 - 1,0;

F2- the actual diameter of the zone of bridging the penultimate wells, m,were closed from the previous round openings, and to control the reliability of the waterproof curtain of plugging the end of the previous round ahead of the tunnel face in the area of the route round production are drilling monitoring wells, some of which after opening the mine workings extend to vent or vent-way sbec.

2. The method according to p. 1, characterized in that the screw for the production of drilling grouting wells pass upward and out of drilling the cement sets vertical wells.

3. The method according to p. 1 or 2, characterized in that in addition to develop for drilling and plugging of wells completed in the ascending or descending line, go screw production for drilling, plugging wells and develop these interconnected horizontal Bonami.

 

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FIELD: mining industry.

SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.

EFFECT: higher efficiency.

7 cl, 11 dwg

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